The latest iOS 12 Update is supported and compatible with many old and new iOS-powered hardware’s such as;

iPhone XS Max

iPhone XS

iPhone XR

iPhone X

iPhone 8 Plus

iPhone 8

iPhone 7 Plus

iPhone 7

iPhone SE

iPhone 6S Plus

iPhone 6S

iPhone 6 Plus

iPhone 6

iPhone 5S

iPod Touch 6th Gen

iPad Pro (12.9-inch 2nd Gen)

iPad Pro (12.9-inch 1st Gen)

iPad Pro (10.5-inch)

iPad Pro (9.7-inch)

iPad Mini 5

iPad Mini 4

iPad Mini 3

iPad Mini 2

iPad (2018 - 6th Gen)

iPad (2017 - 5th Gen)

iPad Air 3

iPad Air 2

iPad Air

List of Compatible watchOS 5 devices

Apple Watch Series 1

Apple Watch Series 2

Apple Watch Series 3

Apple Watch Series 4

List of Compatible tvOS 12 devices

Apple TV 4

Apple TV 4K

Apple iOS 12.4 Release Date and Availability

Currently, the latest iOS 12.4 Beta, tvOS 12.4 Beta, and watchOS 5.3 Beta versions are available to all Apple Developer Program subscribers and general public users worldwide. Whereas the iOS 12 Final, tvOS 12 Final, and watchOS 5 Final updates have been officially released by Apple.

How to Jailbreak iOS 12.4 Beta?

There's no official Untethered iOS 12.4 Jailbreak is available from any well-known iOS Jailbreakers. So users must wait further to successfully Jailbreak iOS 12.4 with Cydia Installation.